Research published in the journal Pediatrics indicates that some dental composites — long promoted as overall safer than mercury-based amalgams — are having a significant negative impact on the psychosocial functioning of children. In fact, bisphenol-A based dental restorations were found to be worse than mercury-based amalgams when it came to learning impairment and behavioral issues. [i]

The study used data from The New England Children’s Amalgam Trial, which, surprisingly, found that children randomized to amalgam restorations had better psychosocial outcomes than those assigned to bisphenol-A based epoxy resin composites (bisGMA) for tooth restorations. The new analysis aimed to “examine whether greater exposure to dental composites is associated with psychosocial problems in children.”